GTU BE 6th Semester 2161407 Food Plant Utilities and Sanitation Summer 2018 Question Paper

1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE – SEMESTER ?VI (NEW) – EXAMINATION ? SUMMER 2018
Subject Code:2161407 Date:08/05/2018
Subject Name:Food Plant Utilities & Sanitation
Time:10:30 AM to 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Define boiler as per ASME and list the main components of a water tube boiler. 03

(b) Answer the following: (i) State the function of economizer and optimizer in boiler. (ii) Define sterilization (iii) Define Population equivalent of a city. (iv) What are steam traps?
04
(c) What is boiler efficiency? List main factors that affect it. In a boiler
performance test, 11400 kg of bituminous coal was consumed in 24 hours
generating 14500 kg dry saturated steam at mean absolute pressure of 8 bar. If
the calorific value of the coal is 30 MJ/kg and the feed water temperature is
maintained uniform at 25
o
C, calculate the following: (i) Boiler efficiency. (ii) Equivalent evaporation in kg per kg fuel.
[Take hg (8 bar) = 2700 kJ/kg, hf (25
o
C) = 135 kJ/kg, hfg (100
o
C) = 2257kJ/kg]
07

Q.2 (a) Define draught and state its objectives in boiler operation. 03
(b) A RCC chimney of 15 m height provides natural draft to a boiler exhaust. The
chimney is operating under maximum discharge condition. The flue gas and
ambient air temperatures are 350
o
C and 25
o
C respectively. Calculate the
following: (i) The draught produced in mm WC. (ii) The air supplied in kg per kg of fuel.
04
(c) Write 1-2 lines on each: (i) Water Softener (ii) QAC (iii) Power factor (iv) Food soil (v) CIP (vi) SIP (vii) Grid
07
OR
(c) Answer the following questions briefly: (i) What are Aerated Lagoons? (ii) What is SCADA? (iii) Define earthing. (iv) Define COD? (v) What are synchro-phasers? (vi) What is the function of OCB? (vii) Define ultimate BOD.
07
Q.3 (a) Explain the significance of p-H value, Surfactants and Nitrates in relation to
effluent treatment.
03 1
Seat No.: ________ Enrolment No.___________
GUJARAT TECHNOLOGICAL UNIVERSITY
BE – SEMESTER ?VI (NEW) – EXAMINATION ? SUMMER 2018
Subject Code:2161407 Date:08/05/2018
Subject Name:Food Plant Utilities & Sanitation
Time:10:30 AM to 01:00 PM Total Marks: 70
Instructions:
1. Attempt all questions.
2. Make suitable assumptions wherever necessary.
3. Figures to the right indicate full marks.
Q.1 (a) Define boiler as per ASME and list the main components of a water tube boiler. 03

(b) Answer the following: (i) State the function of economizer and optimizer in boiler. (ii) Define sterilization (iii) Define Population equivalent of a city. (iv) What are steam traps?
04
(c) What is boiler efficiency? List main factors that affect it. In a boiler
performance test, 11400 kg of bituminous coal was consumed in 24 hours
generating 14500 kg dry saturated steam at mean absolute pressure of 8 bar. If
the calorific value of the coal is 30 MJ/kg and the feed water temperature is
maintained uniform at 25
o
C, calculate the following: (i) Boiler efficiency. (ii) Equivalent evaporation in kg per kg fuel.
[Take hg (8 bar) = 2700 kJ/kg, hf (25
o
C) = 135 kJ/kg, hfg (100
o
C) = 2257kJ/kg]
07

Q.2 (a) Define draught and state its objectives in boiler operation. 03
(b) A RCC chimney of 15 m height provides natural draft to a boiler exhaust. The
chimney is operating under maximum discharge condition. The flue gas and
ambient air temperatures are 350
o
C and 25
o
C respectively. Calculate the
following: (i) The draught produced in mm WC. (ii) The air supplied in kg per kg of fuel.
04
(c) Write 1-2 lines on each: (i) Water Softener (ii) QAC (iii) Power factor (iv) Food soil (v) CIP (vi) SIP (vii) Grid
07
OR
(c) Answer the following questions briefly: (i) What are Aerated Lagoons? (ii) What is SCADA? (iii) Define earthing. (iv) Define COD? (v) What are synchro-phasers? (vi) What is the function of OCB? (vii) Define ultimate BOD.
07
Q.3 (a) Explain the significance of p-H value, Surfactants and Nitrates in relation to
effluent treatment.
03
2
(b) Answer the following: (i) State the characteristics of a good detergent. (ii) Give steps for application of sanitizers.
04
(c) Explain the construction & working of a rotary can washer with a neat diagram. 07
OR
Q.3 (a) Define sanitation. State methods of sanitization. 03
(b) Explain the following: (i) Scale formation and its control. (ii) Surfactants and their applications.
04
(c) Define detergents. Discuss in detail the properties and applications of
detergents in food industry.
07
Q.4 (a) Identify the hazards and their locations in a water system for a food processing
plant and suggest measures for controlling these hazards.
03
(b) Why is oxygen demanded in waste water? Explain BOD and BOD5 and discuss
how BOD5 can be measured analytically.
04
(c) Explain biological waste stabilization. Describe the working of trickling filter
with neat sketch.
07
.OR
Q.4 (a) Define cleaning & explain the following: (i) De-flocculation, (ii) Peptization (iii) Saponification
03
(b) Draw a process flow diagram for water supply system to service the following
requirements: (i) Drinking water (ii) Soft water for boiler (iii) Cleaning and sanitation water (iv) De-mineralized water.
04
(c) Explain anaerobic waste stabilization. With the help of a neat diagram describe
the operation of USABP.
07
Q.5 (a) Name at least 10 applications of compressed air in food industry. 03
(b) Discuss briefly: (i) Diffused aerators. (ii) Significance of
5
BOD
COD
ratio in ETP operation. (iii) Facultative ponds. (iv) Special cleaning methods.
04
(c) Give a typical CIP cleaning cycle for food industry. Explain the following
attributes of CIP system. (i) Heating arrangement (ii) Preparation of solution (iii) Operational techniques and cycles.
07
OR
Q.5 (a) Explain briefly: (i) Flow equalization (ii) Culinary steam (iii) Ozonation of
water.
03
(b) Define boil corrosion. Explain methods of treatment of boiler feed water. 04
(c) Describe various tests to assess the effectiveness of cleaning and sanitation. 07
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